Réponses

  • Utilisateur Brainly
2014-03-09T14:26:17+01:00
A= (3√2+5)²
  =(3V2)²+2*3*V2+5²
  =9*2+6V2+25
  =43+6V2

B=(√7-3)(√7+3)

  =(V7)²-3²
  =7-9
  =-2